tcp_debug.c

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    1 /*
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
   34  * $FreeBSD: src/sys/netinet/tcp_debug.c,v 1.7.2.2 1999/09/05 08:18:38 peter Exp $
   35  */
   36 
   37 #include "opt_tcpdebug.h"
   38 
   39 #ifdef TCPDEBUG
   40 /* load symbolic names */
   41 #define PRUREQUESTS
   42 #define TCPSTATES
   43 #define TCPTIMERS
   44 #define TANAMES
   45 #endif
   46 
   47 #include <sys/param.h>
   48 #include <sys/queue.h>
   49 #include <sys/systm.h>
   50 #include <sys/mbuf.h>
   51 #include <sys/socket.h>
   52 #include <sys/socketvar.h>
   53 #include <sys/protosw.h>
   54 #include <sys/errno.h>
   55 
   56 #include <net/route.h>
   57 #include <net/if.h>
   58 
   59 #include <netinet/in.h>
   60 #include <netinet/in_systm.h>
   61 #include <netinet/ip.h>
   62 #include <netinet/in_pcb.h>
   63 #include <netinet/ip_var.h>
   64 #include <netinet/tcp.h>
   65 #include <netinet/tcp_fsm.h>
   66 #include <netinet/tcp_seq.h>
   67 #include <netinet/tcp_timer.h>
   68 #include <netinet/tcp_var.h>
   69 #include <netinet/tcpip.h>
   70 #include <netinet/tcp_debug.h>
   71 
   72 #ifdef TCPDEBUG
   73 static int      tcpconsdebug = 0;
   74 #endif
   75 
   76 static struct tcp_debug tcp_debug[TCP_NDEBUG];
   77 static int      tcp_debx;
   78 
   79 /*
   80  * Tcp debug routines
   81  */
   82 void
   83 tcp_trace(act, ostate, tp, ti, req)
   84         short act, ostate;
   85         struct tcpcb *tp;
   86         struct tcpiphdr *ti;
   87         int req;
   88 {
   89         tcp_seq seq, ack;
   90         int len, flags;
   91         struct tcp_debug *td = &tcp_debug[tcp_debx++];
   92 
   93         if (tcp_debx == TCP_NDEBUG)
   94                 tcp_debx = 0;
   95         td->td_time = iptime();
   96         td->td_act = act;
   97         td->td_ostate = ostate;
   98         td->td_tcb = (caddr_t)tp;
   99         if (tp)
  100                 td->td_cb = *tp;
  101         else
  102                 bzero((caddr_t)&td->td_cb, sizeof (*tp));
  103         if (ti)
  104                 td->td_ti = *ti;
  105         else
  106                 bzero((caddr_t)&td->td_ti, sizeof (*ti));
  107         td->td_req = req;
  108 #ifdef TCPDEBUG
  109         if (tcpconsdebug == 0)
  110                 return;
  111         if (tp)
  112                 printf("%p %s:", tp, tcpstates[ostate]);
  113         else
  114                 printf("???????? ");
  115         printf("%s ", tanames[act]);
  116         switch (act) {
  117 
  118         case TA_INPUT:
  119         case TA_OUTPUT:
  120         case TA_DROP:
  121                 if (ti == 0)
  122                         break;
  123                 seq = ti->ti_seq;
  124                 ack = ti->ti_ack;
  125                 len = ti->ti_len;
  126                 if (act == TA_OUTPUT) {
  127                         seq = ntohl(seq);
  128                         ack = ntohl(ack);
  129                         len = ntohs((u_short)len);
  130                 }
  131                 if (act == TA_OUTPUT)
  132                         len -= sizeof (struct tcphdr);
  133                 if (len)
  134                         printf("[%x..%x)", seq, seq+len);
  135                 else
  136                         printf("%x", seq);
  137                 printf("@%x, urp=%x", ack, ti->ti_urp);
  138                 flags = ti->ti_flags;
  139                 if (flags) {
  140                         char *cp = "<";
  141 #define pf(f) {                                 \
  142         if (ti->ti_flags & TH_##f) {            \
  143                 printf("%s%s", cp, #f);         \
  144                 cp = ",";                       \
  145         }                                       \
  146 }
  147                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
  148                         printf(">");
  149                 }
  150                 break;
  151 
  152         case TA_USER:
  153                 printf("%s", prurequests[req&0xff]);
  154                 if ((req & 0xff) == PRU_SLOWTIMO)
  155                         printf("<%s>", tcptimers[req>>8]);
  156                 break;
  157         }
  158         if (tp)
  159                 printf(" -> %s", tcpstates[tp->t_state]);
  160         /* print out internal state of tp !?! */
  161         printf("\n");
  162         if (tp == 0)
  163                 return;
  164         printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
  165             tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
  166             tp->snd_max);
  167         printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
  168             tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
  169 #endif /* TCPDEBUG */
  170 }

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FreeBSD/Linux Kernel Cross Reference sys/netinet/tcp_debug.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet/tcp_debug.c